منابع مشابه
Switchable asymmetric bio-epoxidation of α,β-unsaturated ketones.
Efficient asymmetric bio-epoxidation of electron-deficient α,β-unsaturated ketones was realized via a tandem reduction-epoxidation-dehydrogenation cascade, which proceeds in a switchable manner to afford either chiral epoxy ketones or allylic epoxy alcohols with up to >99% yield and >99%ee.
متن کاملKinetic study of unsaturated ketones epoxidation with hydrogen peroxide through the inverse phase transfer catalysis and effect of ultrasonic waves in this epoxidation
Kinetic study of epoxidation of unsaturated ketone of mesityl oxide was studied by usingHydrogen peroxide in the presence of dodecyltrimethyl ammonium bromide (DTAB) as aninverse phase transfer catalyst. The reaction was carried out in the two-phase media of waterheptanewith 1:1 ratio in 25 °C. It was found that the order of reaction for mesityl oxide forketone concentration in the range of 0.0...
متن کاملA computational study on the stereoselective organocatalytic epoxidation of α,β-unsaturated aldehydes with hydrogen peroxide.
The asymmetric synthesis of vicinal diols is a very important process in organic chemistry, as it allows the preparation of a large variety of useful derivatives. One of the most interesting methods to accomplish this synthesis is the asymmetric epoxidation of activated olefins, catalysed by chiral organic or organometallic catalysts. In this paper we study, with computational tools, two possib...
متن کاملSynthetic applications of chiral unsaturated epoxy alcohols prepared by sharpless asymmetric epoxidation.
An overview of the synthesis and applications of chiral 2,3-epoxy alcohols containing unsaturated chains is presented. One of the fundamental synthetic routes to these compounds is Sharpless asymmetric epoxidation, which is reliable, highly chemoselective and enables easy prediction of the product enantioselectivity. Thus, unsaturated epoxy alcohols are readily obtained by selective oxidation o...
متن کاملEfficient epoxidation of unsaturated fatty acids by a hydroperoxide-dependent oxygenase.
Detergent-solubilized and partially purified soybean peroxygenase was shown to actively catalyze, in the presence of alkylhydroperoxides as co-substrates, the epoxidation of mono- and polyunsaturated fatty acids such as oleic and linoleic acids. Octadecenoic acids were found to be better substrates than shorter mono-unsaturated fatty acids (C16:1 or C14:1), but the position of their double bond...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1961
ISSN: 1881-1280,0002-1369
DOI: 10.1271/bbb1961.25.838